CVE-2026-115303

Full vulnerability record from the local CVENow database.

Description

The Contact Form by Supsystic WordPress plugin before 1.11.1 does not strip CR/LF characters or re-validate submitted field values before concatenating them into outgoing email headers when a form is configured to map a submitted field into its Reply-To, From or Cc header, allowing unauthenticated users to inject arbitrary email headers such as additional Bcc or Cc recipients into the notification email.

Severity

LOW

CVSS score

3.7 (v3.1)

Vulnerability status

Deferred

Source identifier

[email protected]

Published

2026-10-29 09:17:08.097000

Last modified

2026-10-29 15:18:27.920000

View original CVE JSON

{
  "id": "CVE-2026-115303",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-29T09:17:08.097",
  "lastModified": "2026-10-29T15:18:27.920",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Contact Form by Supsystic WordPress plugin before 1.11.1 does not strip CR/LF characters or re-validate submitted field values before concatenating them into outgoing email headers when a form is configured to map a submitted field into its Reply-To, From or Cc header, allowing unauthenticated users to inject arbitrary email headers such as additional Bcc or Cc recipients into the notification email."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Unknown",
          "product": "Contact Form by Supsystic",
          "defaultStatus": "unaffected",
          "collectionURL": "https://wordpress.org/plugins",
          "versions": [
            {
              "version": "0",
              "lessThan": "1.11.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T10:43:06.128153Z",
          "id": "CVE-2026-115303",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://wpscan.com/vulnerability/c32e3ccd-84cb-42a4-a343-353a02ccb541/",
      "source": "[email protected]"
    }
  ]
}